CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (75,799)	$ (36,562)	$ (15,571)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	21,421	10,097	4,726
Debt-related accretion in interest expense	8,725	4,355	2,529
Current expected credit losses	1,290	540	830
Provision for obsolete inventory	103	2,256	597
Stock-based compensation	14,615	4,251	2,706
Loss on debt extinguishment	11,916	8,123	0
Adjustment to contingent consideration liability	0	(3,340)	0
Deferred income tax	(10,417)	(3,229)	(4,002)
Changes in operating assets and liabilities:
Accounts receivable	1,832	(1,532)	(15,640)
Inventories	(13,547)	(4,476)	1,864
Other current assets	(3,995)	809	(1,004)
Other assets	(4,001)	326	436
Accounts payable	4,911	(4,176)	3,741
Accrued salaries and benefits	(270)	5,327	1,829
Accrued expenses	(6,096)	(594)	2,412
Customer deposits and deferred service revenue	(1,710)	(3,445)	1,243
Other long-term liabilities	(2,134)	1,027	(2,825)
Net cash used in operating activities	(53,156)	(20,243)	(16,129)
Cash flows from investing activities:
Cash paid for acquisition, net of cash acquired	(374,705)	0	(19,835)
Settlement of working capital for acquisition	0	191	0
Capital expenditures	(1,435)	(1,299)	(2,462)
Capitalization of software costs	(6,852)	(7,932)	(4,068)
Proceeds from sale of product line	0	0	2,482
Net cash used in investing activities	(382,992)	(9,040)	(23,883)
Cash flows from financing activities:
Principal payments of long-term debt	(4,174)	(629)	0
Payments for the extinguishment of notes payable	(183,618)	(66,250)	0
Proceeds from common stock issuance	215,000	131,407	0
Payments for common stock issuance costs	(6,828)	0	0
Proceeds from debt issuance, net of original issue discount	441,385	115,786	75,039
Payments for debt issuance costs	(13,998)	0	0
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock	(5,315)	(297)	(544)
Proceeds from exercise of stock options	1,156	675	1,433
Payments of bank borrowing	0	0	(17,459)
Payments of bank borrowing	0	0	9,640
Payment of contingent consideration	0	0	(2,550)
Net cash provided by financing activities	443,608	180,692	65,559
Effect of exchange rate changes on cash and cash equivalents	273	1,241	(996)
Net increase in cash and cash equivalents	7,733	152,650	24,551
Cash and cash equivalents at beginning of period	180,686	28,036	3,485
Cash and cash equivalents at end of period	188,419	180,686	28,036
Supplemental disclosures of cash flow information:
Interest	8,383	4,018	1,293
Income taxes, net of refunds	0	205	(321)
Bonus accrual to be paid in common shares	0	620	833
Capitalized software recorded in accounts payable	48	316	0
Capital expenditures in accounts payable	26	228	0
Tax withholding in accrued salaries and benefits related to treasury stock acquired from employees	643	0	0
Common stock issued in acquisition		0	0
Notes payable for AccSys	0	0	2,000
Contingent consideration for AccSys	0	0	3,340
Punchh Inc.
Supplemental disclosures of cash flow information:
Common stock issued in acquisition	110,219
AccSys LLC (Restaurant Magic)
Adjustments to reconcile net loss to net cash used in operating activities:
Adjustment to contingent consideration liability		3,300
Supplemental disclosures of cash flow information:
Common stock issued in acquisition	$ 0	$ 0	$ 27,527